cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Evi Aprianti
Contact Email
eviaprianti93@yahoo.com
Phone
+6282387555381
Journal Mail Official
ialt_lti@unhas.ac.id
Editorial Address
International Association of Lowland Technology In Collaboration with Hasanuddin University and Saga University Address Faculty of Engineering, Center of Technology Building, 1st Floor Jalan Poros Malino km. 6, Bontomarannu, Gowa Indonesia Postal Code: 91711
Location
Unknown,
Unknown
INDONESIA
Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 17 Documents
 1   2 
Search results for , issue "Vol 20 No 2, Sep (2018)" : 17 Documents clear
Building with the on-site manufacturing process N. Pattanajan; A. Suddeepong; S. Horpibulsuk
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In general, the process of building construction makes the inevitable wastes such as nails, formwork, steel and concrete. In order to reduce these wastes, parts of building have therefore been produced by using the manufacturing process. This process can improve construction process with minimum wastes and time of construction. However, the manufacturing process is not completely effective for building construction. There is also an additional cost for the transportation from manufactory to the construction site. For this reason, to set the exact time of the construction process, to avoid material waste and to effectively reduce the construction cost, all the production processes of manufacturing building should be started and ended at construction sites. This research has studied the Lean Manufacturing Process (LMP) and applied to the process of the construction which is called “the building with the on-site manufacturing process, BMP” to reduce instable human resource by machines which provides three advantages as follows: 1) the better quality, 2) minimum constructing cost and 3) minimum constructing period.
LEED building project management in Thailand N. Chaisaard; W. Taemthong
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Green construction management practices have become a necessity in the modern construction industry. However, the ever-growing demand for green buildings in Thailand necessitates the appropriate green project management systems which are distinct from those involved in managing a conventional project. LEED certification is the most acceptable green rating system. In this research paper, seven LEED building projects in Thailand are investigated to generate information concerning the common processes inherent in green project management. Forty stakeholders, including project owners, designers, contractors, LEED consultants and facility managers associated with the projects, were interviewed. The results shown in terms of recommended management guidelines for developing LEED projects in Thailand comprising four phases. These consist of conceptual and feasibility, design, construction and project delivery phases. Our proposed guidelines can potentially benefit future green project developments in order to enhance global sustainability. This paper suggests the guideline for project management with LEED project in Thailand which is appropriate to utilize further in developing context.
Preparation of anionic-exchange membranes composites for acid recovery from acidic wastewater P. Pattiyatanee; W. Chonkaew; S.P Thanasupsin
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to prepare the anion exchange membrane (AEM) from brominated poly (2, 6-dimethyl-1, 4-phenylene oxide)/polypyrrole (BPPO/Ppy) composites, and to study the effects of pyrrole (Py) concentrations and amination reaction on conductivity and transport properties of the membranes. The 8 wt% PPO was reacted with 20 wt% Br2 in chlorobenzene solutions at a control temperature of 131℃. The obtained product was characterized by FTIR and H-NMR to confirm the benzyl bromination on PPO. BPPO membranes were prepared by solution casting method (thickness 0.45 - 0.5 mm). The BPPO/Ppy composites were prepared by soaking the BPPO membrane in Py solution (vary from 0.3 – 0.5 mol dm-3 for 24 hr. The ion exchange capacity (IEC), water uptake (WR) and conductivity of the membranes were investigated. The effects of amination reaction with 0.5 mol.dm-3 trimethylamine (TMA) were also studied. The results showed that ion exchange capacity (IEC), conductivities and water uptake and acid permeability of composite membranes were enhanced by amination reaction. However, the BPPO/Ppy composite membrane without TMA amination was found to provide the better acid diffusion coefficient than that with TMA. Further investigations should focus on fine tuning the conditions to obtain high hydrophilicity, water uptake and ion selectivity rejection.
Environmental impact evaluation of road pavements using life cycle assessment tool A. Boonpoke; J. Sriburee; S. Sedpho; T. Prasertsang
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The acquisition of road construction materials, building processes, rehabilitation, demolition, and disposal of road surfaces adversely impact the environment. In Thailand, the rapid expansion of road transportation networks has raised concerns regarding environmental degradation. Alternative road pavement materials need to be assessed from a life cycle assessment perspective to promote sustainable global development. An environmental impact evaluation was undertaken for two major road types - concrete and asphaltic concrete (AC) pavements - using life cycle impact assessment, with relevant data obtained from related government documents and reports. Results indicated that AC pavement had a higher impact on climate change than concrete pavement, while concrete pavement exhibited a higher impact on terrestrial acidification, human toxicity, metal depletion, and fossil depletion than AC pavement. Building material acquisition and construction contributed the major impact on climate change at 93.2% and 83% for concrete and AC roads, respectively. The mitigation options for reducing the impact of climate change impact were utilization of a mixture of 35 to 50% fly ash with cement instead of cement only in concrete pavement process and implementation of recycling in rehabilitation phase for AC pavement. The findings can be applied to support future decision-making processes for the sustainable development of road construction projects.
Fate and transport of paraquat dichloride in corn and rubber plantation soils D. Keochan; W. Sinlapathorn; P. Phuinthiang; N. Nawinwattana; M. Jindakaraked; P. Kajitvichyanukul
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The rubber and corn plantation soils in Nan province were investigated for the fate and transport behavior of the paraquat dichloride including biodegradation, adsorption, photolysis and infiltration. All experiments were conducted in the batch scale in laboratory basis. Results showed the biodegradation and photolysis were the main factors in decreasing the paraquat dichloride concentrations in the corn soil and rubber soil. The adsorption and infiltration described the holding and the leaching of paraquat dichloride of the soils. The biodegradation rates of paraquat dichloride in corn and rubber soils were 0.0548 and 0.0213 kg/day-mg, respectively. In photolysis reaction, the kinetic rate constants for corn and rubber soils were 0.017 and 0.0133 kg/min-mg, respectively. Corn and rubber soils had strong and quick adsorption for paraquat dichloride due to the soil textures of both two soils are clay and the high amount of cation exchange capacity. Corn soil had higher adsorption rate constant than rubber soil The adsorption behavior of paraquat dichloride in rubber soils is best described by Freundlich isotherm and that in the corn soil is best describe by Langmuir-II isotherm. The kinetic rate constants for photo-degradation of paraquat dichloride in corn and rubber soils were 0.0170 and 0.0133 kg/mg-min, respectively. From the mass balance, paraquat dichloride in leachates was detected in the lower amount than in the soil for both corn and rubber soils. Although paraquat dichloride can bound to organic matter or soil particles and adsorb in the soil, small amount of paraquat dichloride can be leached out to the groundwater.
Comparison of fate and transport of atrazine in corn and rubber plantation soils W. Sinlapathorn; D. Keochanh; P. Phuinthiang; N. Nawinwattana; M. Jindakaraked; P. Kajitvichyanukul
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The rubber and corn plantation soils in Nan province were investigated for the fate and transport behavior of the atrazine. The biodegradation, adsorption, photodegradation, and infiltration of atrazine in both soils were conducted. The kinetic rates of each experiment were calculated and reported. Results illustrated that the microbials in the soils have a high tendency in consuming the atrazine in both corn and rubber soils. The corn soils with the biodegradation rate as 0.2523 Kg/mg-min had higher kinetics rate than rubber soil with 0.1357 Kg/mg-min. Langmuir isotherm best described the adsorption of atrazine in both corn and rubber soils. The sorption capacity of atrazine adsorption on the rubber soil (1/qm = 9.7095) was much higher than the corn soil (1/qm = 0.5195). The amount of herbicide residue bonded on soil after application in the rubber soil was slightly higher than the corn soil, and the photolytic rate in the rubber soil is much higher than that in the corn soil. From the mass balance, atrazine in water was detected in the higher amount than in the soil for both corn and rubber soils. The infiltration rate in corn soil was 13.1 mm/hr while that in rubber soil was 11.8 mm/hr. The mass of atrazine in the leachate is in the range of 32.1-75.3% in both corn and rubber soils during 36 hours of infiltration. This experiment is the scientific evidence supporting that the contamination of atrazine in groundwater has high tendency to occur in the extreme application of the atrazine to the agriculture soil.
Research oriented ground improvement projects in Changi, Singapore M. W. Bo; A. Arulrajah; V. Choa; S. Horpibulsuk
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Changi East Reclamation projects in Singapore were implemented under 5 Phases commencing from 1991 and completed in 2005 with one phase to another has several of years of overlapping. The total implementation period was 15 years including maintenance. The Phases are named as Phase 1A, 1B, 1C, Area A (North) and Area A (South). Each Phase took about 5 to 6 years to implement. Due to the involvement of large area fills in the form of land reclamation with as thick as nearly 20 meters of hydraulic fills over up to 40 meters thickness of compressible marine clay, significant challenges were present to the geotechnical engineers on geotechnical issues such as slope stability, consolidation settlement and liquefaction potential. Due to the excessive magnitude of settlement likely to occur over a long period of duration caused by consolidation process, extensively large area was required to improve applying ground improvement methods to accelerate the consolidation process. Therefore, a good design of accelerating consolidation process by applying ground improvement method was deemed necessary. Many combinations of pilot tests were implemented to verify the design of ground improvement works. In addition to improving the underlying soils, improvement was also required for the fills which were loosely deposited by means of hydraulic filling techniques. In order to be able to successfully implement these complex projects, applying the most up to date state of the art technologies, implementation of research level planning, investigation, design and implementation processes were required throughout the projects from master planning stage to commissioning stage. Several forms of performance monitoring using geotechnical instrumentation, verification of achieving specified improvement using intermediate and post improvement ground investigation and in-situ testing were implemented during and acceptance of ground improvement works. Quality control and assurance tests of material delivered and used for ground improvement were carried out throughout the implementation process. This paper presents how research oriented ground improvement projects were implemented in the past decade in Singapore.
Laboratory evaluation of biosolids stabilized with demolition wastes as an embankment fill material A. Arulrajah; F. Maghool; S. Horpibulsuk; M. W. Bo; L. Shen
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Biosolids (Bio) are air-dried sewage sludge from wastewater treatment plants.Stockpiles of Bioare rapidly increasing around the globe. The primary aim of this paper was to evaluate the potential for Bio stabilized with demolition wastes as an embankment fill material. This laboratory evaluation study was undertaken to evaluate the geotechnicalproperties of Biowhen stabilized with various percentages of demolition wastes, being Crushed Brick (CB) and Crushed Concrete (CC). The standard compaction results indicated that the dry density of Bio increased with the addition of both demolition wastes. The optimum moisture content of Bio was found to consistently decrease with increasing amounts of demolition wastes. The gradation, pH value and specific gravity of Bio samples improved with the addition of demolition wastes. The California Bearing Ratio (CBR) value of Bio samples was increased with the addition of CB and CC, with the optimum value found to be achieved with 50% CC content (Bio50/CC50). The positive outcomes of this research project will potentially enable Bio to be used in combination with demolition wastes in embankment fill applications. This sustainable approach will reduce the demand for virgin materials and will potentially divert significant quantities ofthese waste materials fromlandfills and into a high value embankment fill material.
Load test of pre-cast geopolymer concrete slabs C. Ridtirud; V. Lam; C. Sapsin
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to study load testing of pre-cast geopolyme r concrete slab. Fly ash, a by-product of generation process of electricity was used in mixture as alternative to ordinary Portland cements in this research. To design and produce pre-cast geopolymer concrete slab, the compressive strength of geopolymer concrete was tested by using fly ash: fine aggregate: coarse aggregate ratio of 1:0.95:1.76 by weight, and the ratio of sodium silicate to sodium hydroxide of 1:1 by weight. The pre-cast geopolymer concrete slab of 0.35x2.40x0.05 m. was designed with live load of 150 kg/ sq. m, five PC-wire of 4 mm. with ultimate strength not less than 17,500 kg/ sq. cm, and was pulled by forced of 13,329 kg/ sq. cm. In this research, precast geopolymer concrete slab was casted and tested by following to Thai Industrial Standards Institute 577-2531. The result of testing pre-cast geopolymer concrete slab was showed that, the value of deflection was exceeded and rebound was less than allowable by the Thai Industrial Standards Institute 577-2531. However, in this research the pre-cast geopolymer concrete slab might be stronger and increase load bearing capacity if the processing of temperature was raised.
Weakly singular BIEM for analysis of cracks embedded in symmetric elastic whole space T. N. Pham; J. Rungamornrat; W. Pansuk; Y. Sato
Lowland Technology International Vol 20 No 2, Sep (2018)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this paper, a weakly singular boundary integral equation method is developed for the stress analysis of an anisotropic, linearly elastic, cracked whole space possessing a plane of symmetry. This study should offer an alternative powerful tool essential for the modeling of both near-surface and deeply embedded defects in a rock/soil medium. A system of governing equations is established using a pair of weakly singular, weakform, displacement and traction integral equations for the cracked whole space along with the symmetric condition. The final equations contain only unknown crack-face data in a lowerhalf of the whole space. In addition to their capability to treat cracks of arbitrary shape, material anisotropy and general loading conditions, all involved kernels are weakly singular allowing all integrals to be interpreted in the sense of Riemann. A symmetric Galerkin boundary element method together with the Galerkin approximation is implemented to solve the governing integral equations for the unknown crack-face data. To further enhance the accuracy and efficiency of the proposed scheme, special basis functions are introduced to approximate the near-front field and the interpolation technique is adopted to evaluate all kernels for generally anisotropic materials. The solved crack-face displacement data is then utilized to postprocess for the essential fracture information along the crack front. Various scenarios are employed to verify the proposed technique and a selected set of results is presented to demonstrate its accuracy and computational robustness.

Page 1 of 2 | Total Record : 17

 1   2 

Filter by Year

2018 2018


Reset
Filter By Issues
All Issue Vol 24 No 4 (2024): Lowland Technology International Journal Vol 24 No 3 (2023): Lowland Technology International Journal Vol 24 No 2 (2022): Lowland Technology International Journal Vol 24 No 1 (2022): Lowland Technology International Journal Vol 23 No 4 (2022): Lowland Technology International Journal Vol 23 No 3 (2021): Lowland Technology International Journal Vol 23 No 2 (2021): Lowland Technology International Journal Vol 23 No 1 (2021): Lowland Technology International Journal Vol 22 No 4 (2021): Lowland Technology International Journal Vol 22 No 3 (2020): Lowland Technology International Journal Vol 22 No 2 (2020): Lowland Technology International Journal Vol 22 No 1 (2020): Lowland Technology International Journal - Special Issue on: Engineering Geology Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co Vol 21 No 3, Dec (2019) Vol 21 No 2, Sep (2019) Vol 21 No 1, June (2019) Vol 20 No 4, March (2019): Special Issue on: Green Technology for Sustainable Infrastructure Develop Vol 20 No 3, Dec (2018) Vol 20 No 2, Sep (2018) Vol 20 No 1, June (2018) Vol 19 No 4, March (2018) Vol 19 No 3, Dec (2017) Vol 19 No 2, Sep (2017) Vol 19 No 1, June (2017) Vol 18 No 4, March (2017) Vol 18 No 3, Dec (2016) Vol 18 No 2, Sep (2016) Vol 18 No 1, June (2016) Vol 17 No 4, March (2016) Vol 17 No 3, Dec (2015) Vol 17 No 2, Sep (2015) Vol 17 No 1, June (2015) Vol 16 No 2, Dec (2014) Vol 16 No 1, June (2014) Vol 15 No 2, Dec (2013) Vol 15 No 1, June (2013) Vol 14 No 2, Dec (2012) Vol 14 No 1, June (2012) Vol 13 No 2, Dec (2011) Vol 13 No 1, June (2011) Vol 12 No 1 (2010): Vol 12 No. 1, June (2010) Vol 12 No 2, Dec (2010) Vol 11 No 2, Dec (2009) Vol 11 No 1, June (2009) Vol 10 No 2, Dec (2008) Vol 10 No 1, June (2008) Vol 9 No 2, Dec (2007) Vol 9 No 1, June (2007) Vol 8 No 2, Dec (2006) Vol 8 No 1, June (2006) Vol 7 No 2, Dec (2005) Vol 7 No 1, June (2005) Vol 6 No 2, Dec (2004) Vol 6 No 1, June (2004) Vol 5 No 2, Dec (2003) Vol 5 No 1, June (2003) Vol 4 No 2, Dec (2002) Vol 4 No 1, June (2002) Vol 3 No 2, Dec (2001) Vol 3 No 1, June (2001) Vol 2 No 2, Dec (2000) Vol 2 No 1, June (2000) Vol 1 No 2, Dec (1999) Vol 1 No 1, June (1999) More Issue